Sega have have shipped—not sold—over 1 million units of the Project Diva series to date in Japan, they say. So far, the series includes Project Diva, Project Diva 2nd, and Project Diva Extend. In celebration, Sega are giving away commemorative pins to 390 randomly selected users who fill out this survey.

Additionally, all who fill the survey will also receive a special commemorative PC wallpaper. The survey runs up until April 27th.